1000721496 has 16 divisors (see below), whose sum is σ = 2501803800. Its totient is φ = 333573824.

The previous prime is 1000721387. The next prime is 1000721537. The reversal of 1000721496 is 6941270001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20848341 + ... + 20848388.

Almost surely, 2^1000721496 is an apocalyptic number.

It is an amenable number.

1000721496 is an abundant number, since it is smaller than the sum of its proper divisors (1501082304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000721496 is a wasteful number, since it uses less digits than its factorization.

1000721496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41696738 (or 41696734 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1000721496 is about 31634.1823981591. The cubic root of 1000721496 is about 1000.2404408502.

Adding to 1000721496 its reverse (6941270001), we get a palindrome (7941991497).

The spelling of 1000721496 in words is "one billion, seven hundred twenty-one thousand, four hundred ninety-six".